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Finding the Fourth Proportional to 357,039.70, 492,266.46 and 261,380.32

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Solution

The fourth proportional to 357,039.70, 492,266.46 and 261,380.32 is: 360,376.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,039.70 : 492,266.46 = 261,380.32 : x
  2. Step 2: Convert to fraction form
    357,039.70/492,266.46 = 261,380.32/x
  3. Step 3: Cross multiply
    357,039.70x = 492,266.46 × 261,380.32
  4. Step 4: Simplify right side
    357,039.70x = 128,668,764,589.58
  5. Step 5: Solve for x
    x = 128,668,764,589.58/357,039.70
  6. Step 6: Final answer
    x = 360,376.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.